fixed vCalendar generation bug and deleted useless dependency

QuickFuzz.cabal

@@ -88,7 +88,7 @@ executable QuickFuzz
       build-depends:  zlib, tar, zip-archive, base16-bytestring 
 
   if flag(docs)
-      build-depends: pandoc-types, pandoc, data-default, hps, hcg-minus, iCalendar, quickcheck-instances
+      build-depends: pandoc-types, pandoc, data-default, hps, hcg-minus, iCalendar
 
   if flag(pki)
       build-depends: certificate, asn1-data, time

src/ICal.hs

@@ -4,17 +4,18 @@
 module ICal where
 
 import Test.QuickCheck
-import Test.QuickCheck.Instances
+
 import DeriveArbitrary
 import Text.ICalendar.Types
 import Text.ICalendar.Printer
 import Data.Char (ord)
 
---import Time
 import qualified Data.ByteString.Lazy.Char8 as LC8
-
 import qualified Data.ByteString.Lazy.Builder as Bu
 
+import Time
+import Strings
+
 $(devArbitrary ''VCalendar)
 
 utf8Len :: Char -> Int

src/Strings.hs

@@ -3,6 +3,23 @@ module Strings where
 import Test.QuickCheck
 import Data.Char (chr)
 
+import qualified Data.Text as TS
+import qualified Data.Text.Lazy as TL
+
+-- Text
+instance Arbitrary TS.Text where
+    arbitrary = TS.pack <$> arbitrary
+    shrink xs = TS.pack <$> shrink (TS.unpack xs)
+
+instance Arbitrary TL.Text where
+    arbitrary = TL.pack <$> arbitrary
+    shrink xs = TL.pack <$> shrink (TL.unpack xs)
+
+instance CoArbitrary TS.Text where
+    coarbitrary = coarbitrary . TS.unpack
+
+instance CoArbitrary TL.Text where
+    coarbitrary = coarbitrary . TL.unpack
 
 genName :: Gen String
 genName = listOf1 validChars :: Gen String

src/Svg.hs

@@ -44,10 +44,10 @@ import Images
 
 data MSvgFile  = MSvgFile Document deriving Show
 
-instance  Arbitrary DT.Text where
-   arbitrary = do 
-     xs <- mgenName
-     oneof $ Prelude.map (return . T.pack) [xs]
+--instance  Arbitrary DT.Text where
+--   arbitrary = do 
+--     xs <- mgenName
+--     oneof $ Prelude.map (return . T.pack) [xs]
 
 instance Arbitrary String where
   arbitrary = mgenName